Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc8c844bf63f484…

MALICIOUS

PDF

80.1 KB Created: 2022-04-25 14:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-20
MD5: c5364b8ac9f88e7801249221cff7da16 SHA-1: 866cb5b22f619e9eca956ae6fe50eedd94c63dd9 SHA-256: 3bc8c844bf63f48455295a7d1e1a6cda8360630fdca77d114c37043894b59ef1
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded external links, identified as a link farm, with the content suggesting a lure for fitness plans. The primary purpose appears to be directing users to potentially malicious or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xigufolasifu.weebly.com/uploads/1/3/4/3/134352497/8516601.pdf In PDF document text
    • http://cascad-trans.ru/files/mijiniwuvakilu.pdfIn PDF document text
    • http://www.albertoabajolimousin.com/abm/Bibliotecas/kcfinder/upload/files/92603560666.pdfIn PDF document text
    • https://joworuzofoluj.weebly.com/uploads/1/3/2/6/132683209/2044217.pdfIn PDF document text
    • https://tinilafoxo.weebly.com/uploads/1/4/1/2/141251242/c5c6c882063cd07.pdfIn PDF document text
    • https://dipediras.weebly.com/uploads/1/3/0/7/130739778/3410505.pdfIn PDF document text
    • https://malozesa.weebly.com/uploads/1/3/4/5/134505473/xixinategefit-mizumoda-regujib-pagoputa.pdfIn PDF document text
    • https://actionalbertafoundationrepair.com/nbloom/fckuploads/file/bofuvo.pdfIn PDF document text
    • https://www.cultureowl.com/kcfinder/upload/files/68495051226.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16241bfa6c5324---4285329077.pdfIn PDF document text
    • https://panujiwawavila.weebly.com/uploads/1/3/4/4/134457592/falorowiratisom.pdfIn PDF document text
    • https://wokimexerevup.weebly.com/uploads/1/3/7/5/137516918/xekuf_kazizasoku_dobavo_refapedosi.pdfIn PDF document text
    • https://bokixewabukogu.weebly.com/uploads/1/3/4/3/134341992/fibad.pdfIn PDF document text
    • https://bigubiforuse.weebly.com/uploads/1/3/5/3/135389938/3057869.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/59638937807.pdfIn PDF document text
    • https://actieaanbieding.com/upload/content/files/34675725558.pdfIn PDF document text
    • https://wuvalarovujed.weebly.com/uploads/1/3/4/2/134266489/ganopabevuwaxu_vutiluvupi.pdfIn PDF document text
    • https://jowozulabu.weebly.com/uploads/1/3/4/0/134013075/948b8.pdfIn PDF document text
    • https://sunuf.co.za/YmrXLWy8?keyword=how%20to%20draw%20up%20a%20fitness%20planPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0000d56c.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000d56c.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED83 10668 bytes
SHA-256: c6e5b43085594fc7915fda83671a1f71ad29dc990428a802acf9d51aaeed21f6
font_02_sfnt_off0001060d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060D 16632 bytes
SHA-256: 0ffd8f1e9c07a650e801b2fa17724ccff3e64de13481672373e0a6843e0e4f75